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On the flutter characteristics of separated two box girders
Matsumoto, Masaru,Shijo, Rikuma,Eguchi, Akitoshi,Hikida, Tetsuya,Tamaki, Hitoshi,Mizuno, Keisuke Techno-Press 2004 Wind and Structures, An International Journal (WAS Vol.7 No.4
The flutter characteristics of long span bridges are discussed from the point of the unsteady pressure distribution on bridge deck surface during heaving/torsional vibration related to the aerodynamic derivatives. In particular, it is explained that the coupling terms, which consist of $A_1^*$ and $H_3^*$, play a substantial role on the coupled flutter, in comparison with the flutter characteristics of various structural sections. Also the effect of the torsional/heaving frequency ratio of bridge structures on the flutter instability is discussed from the point of the coupling effect between heaving and torsional vibrations.